Asian Stocks Track Wall Street Lower

Asian markets weakened on Friday, following a negative lead from the U.S., while Hong Kong led the region lower as data suggested China's service sector was slowing.

Activity in the Chinese service sector cooled in December, according to China's official nonmanufacturing Purchasing Managers' Index. The statement released on Friday gave a reading of 54.6 last month, compared with 56 in November—a marked deceleration, though the measure...